So this is a chapter for all you die-hard undertale fans out there that are scratching your heads about my fic. It's where I'll be answering any questions left in the comments, as well as explaining why things work in here the way that they do, as I don't want to bore you with the details in the story content.
First of, I suppose I should explain my OC Lady Phantom. Lady is a natural half-human half ghost hybrid from the Danny Phantom-verse. If you want to know more about her history, I've started to put it down in my other fictions. but for now,I'm gonna move onto the other stuff. Now you may be wondering why Lady seems to be a bit more powerful than the undertale ghosts. this is because, unlike the undertale ghosts, Lady doesn't originate from the under-verse. In fact, she is made up of almost an entirely different material as them. Undertale ghosts are made of mostly magic, where Lady is a combination of Ectoplasem and human materials. Because of this, the magic of the Under-verse is affecting her and messing with her powers, however, even in her weakened state, she is more powerful than the other ghosts because her ectoplasem makes her more tangible and able to have more of an effect on the material world. In addition to this, Lady is essentially a pure amalgamation of a human-monster hybrid because she is the naturally-born daughter of a human and a ghost. While this may make her potentially quite powerful in the under-verse, it also makes her as weak, if not weaker than any other normal human in the under-verse, because she is essentially a walking, talking human soul, and prolonged contact to any monster would endanger her of the risk of being absorbed by said monster, and potentially losing herself in the process, so she has to be careful about how long she remains in physical contact with any monster.
Well, that's about everything I can explain for now. Feel free to ask stuff in the comments! ^^